Fikáček, Martin, Franz Hebauer, and Michael Hansen. “Taxonomic Revision of New World Species of the Genus Oosternum Sharp (Coleoptera: Hydrophilidae: Sphaeridiinae) I. Definition of Species Groups and Revision of the Oosternum Aequinoctiale Group”. Zootaxa 2054, no. 1 (March 27, 2009): 1–37. Accessed April 20, 2025. https://mapress.com/zt/article/view/zootaxa.2054.1.1.